alt Hacker NewsIt's a wrapper around Wireguard that lets you use common SSO providers (Apple ID, Google, etc) to manage access.
It also handles looking up the IP address of your "nodes" through their servers, so you don't need to host a domain/dns to find the WAN IP of your home network when you're external to it (this is assuming you don't pay for a fixed IP).
Most people put an instance of it on a home server or NAS, and then they can use the very well designed and easy to use iOS/mac/etc client to access their home network when away.
You can route all traffic through it, so basically your device operates as if you're on your home network.
You can accomplish all of this stuff (setting up a VPN to your home network, DNS lookup to your home network) without Tailscale, but it makes it so much easier.
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I was still completely mystified until your last sentence. And now I'm just mostly mystified. I, too, keep hearing Tailscale Tailscale Tailscale from HN commenters but have no idea why I'd need it. For anything I need to access on (or from) my home network I just use a VPN I've hosted in my home for the last decade or so.
TS makes it super easy to use a VPC I have in the US as my VPN exit while I live in other parts of the world. Apps that work on phones, computers, and my AppleTV are big pluses over Wireguard which I have also used.